Refractory plug for ingot molds



Feb. 19, 1929. 31;?02790 E. 1.. MESSLER REFRACTORY PLUG FOR INGOT MOLDSFiled April 24, 1928 l FIG 3 FIG. 2

FIG. 5

INVENTOR EUGENE L. MESSLER.

'13, mmwrzwm his asHorneg' Patented Feb. 19,1929. a Q 1,702,790

UNITED STATESTPATEUNT OFFICE.

EUGENE L. MESSLER, OF PITTSBURGH, PENNSYLVANIA. 1X

REFRACTORY PLUG FOR INGOT MOLDS.

Application filed April 24, 1928. Serial No. 272,425.

This invention relates to an improvement metal would escape during thepouring operin ingot mold plugs and the like. ation. I

As is well known in the art, ingot molds To overcome this disadvantageand to perare usually constructed to mold an ingot of Init a readycentering of the plug 5, as shown metal with its large end up. Thispractice in Fig. 5, the side surface 5 of the plug permits the ingot tobe readily withdrawn is tapered about five degrees more than the fromthe mold with th'e aid of the ordinary side wall 1 of the hole 1. Thisdifference stripping ram which passes through the botin taper permits aline contact between the tom hole ofthe, so called, big-end up inplug 5and the ingot mold 2 at 4. Obviously 10 got molds. the plug 5, due toits taper, is free to pass over 20 problem to contend with.

Over a period of years next preceding the slight irregularities of thesurface 1, and for filing of this application a great. many dethe samereason the plug is easily dropped vices have been evolved to plug theaforesaid into place to seat itself. bottom hole of the ingot during thepouring Since the line contact between the ingot and cooling of themetal therein. These demold and the plugis adjacent the upper edge viceshave proven in many instances to be too of the plug, as shown at 4 inFigure 5, it difficult to properly install in the ingot mold should beunderstood that any irregularities or have been of such form or shapethat their in the mold opening 1 tending to destroy the transportationand storage was a difficult line contact do not in fact do so. This isfor the reason that the weight of the plug The object of this inventionis, therefore, to and the reaction of the .molten metal first provide aningot mold plug which is comstriking the plug causes the upper edgethereposed of a suitable cementitious heat resistof to chip and spallaround the irregulariing composition, and which is so formed that ties,and in this manner the plug will settle.

25 its installation and transportation or storage in the hole 1 tomaintain the line contact.

may be made with relative facility. With this particular shape of plugit was In the accompanying drawings Figure 1 is found that its depthneed not be more than a plan View of a large size plug of this intwentyper cent of its diameter for the twelve v ventlon; Flgure 2 1s a verical cen ral inch sizes, and in the six inch sizes it has been 30 tionalview of the same; Figure 3 is a plan found that forty per cent of thediameter 8 view of a smallertype of plug embodying gives suflicientdepth of material to result in the same general structure as theprevious th n s ar trength,

pl g; Figure 4 1S a central vertical sectional Figuresl to 4 inclusivegive a detailed idea view of the plug shown in Fig. 3; and Flgur of therelative proportions of the twelve inch 5 5 is a central vcrtlcalsectional view through lu 3 d th ix i h l g 5, It is to be an ingot meldShowing a pl g f this l V understood that sizes intermediate of the tioninstalled thereln. plugs shown'may be constructed having the Althoughthe formation of the ingot mold dimensions determined by the properratio plug is the essence of this invention, it is well to th lugs.

40 to note that the composition described and. The relatively flat ordisk shape of the claimed in my co-pending application, Seri plugspermits them to be packed very close t0- No. 220,288, filed September17, 1927, h gether for either transportation or storage.

Pm n f be h s known Substance of This featurealone would prove them verywhich to make the plug. p valuable. to the trade, since a large portionHeretofore it has been the practice to make "of the cost of the ingotmold plugs is replugs of this generalstructure. of relatively, flectedfrom transportation charges which great depth; that is, the plug wouldextend are greatly reduced due to lesser weight per downwardlyapproximately half the depth of plug. That is, the plugs of the presentinthe bottom hole 1 of the ingotmold 2. It was vention, due to theircomposition and defurther the practice to have the sides of the creasedthickness, weigh about sixty per cent plug and the sides of the holesubstantially as much as the plugs now in use.

parallel. In the event that any irregularitles What I claim is:

were on the walls 1 of the bottom hole 1, it 1. An ingot mold plughaving a side suris obvious that a plug of this nature would facetapered five degrees or more than the 55 not seat tightly, and as aresult some molten taper of ingot mold hole wherein it seats to permitonly a line contact between said plug ing its sides formed with a singlesurface and the ingot mold. tapered to a greater degree than the wall of2. An ingot mold bottom plug having its the bottom hole of the ingotmold. 10 sides formed with a single surface tapered to In witnesswhereof, I hereunto set my 5 a greater degree than the Wall of thebottom hand. a

hole of the ingot mold.

3. An ingot mold plug of disk shape hav- EUGENE L. MESSLER.

